<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" dir="ltr" lang="en"><head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Removed a resampler name "anti" (Page 1) / UADE - Developer discussion / Kohina</title>
<link rel="stylesheet" type="text/css" href="UADE%20-%20Developer%20discussion%20%231_pliki/Kohina.css">
<!--[if lte IE 6]><script type="text/javascript" src="style/imports/minmax.js"></script><![endif]-->
<link rel="alternate" type="application/atom+xml" href="http://board.kohina.net/extern.php?action=feed&amp;tid=894&amp;type=atom" title="Atom topic feed">
<script src="UADE%20-%20Developer%20discussion%20%231_pliki/ga.js" async="" type="text/javascript"></script><script type="text/javascript">

var _gaq = _gaq || [];
_gaq.push(['_setAccount', 'UA-21027425-1']);
_gaq.push(['_trackPageview']);

(function() {
	var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true;
	ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js';
	var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s);
})();
</script>
</head>

<body>

<div id="punviewtopic" class="pun">
<div class="top-box"><div><!-- Top Corners --></div></div>
<div class="punwrap">

<div id="brdheader" class="block">
	<div class="box">
		<div id="brdtitle" class="inbox">
			<h1><a href="http://board.kohina.net/index.php">Kohina</a></h1>
			<div id="brddesc">Old school game and demo music</div>
		</div>
		<div id="brdmenu" class="inbox">
			<ul>
				<li id="navindex" class="isactive"><a href="http://board.kohina.net/index.php">Index</a></li>
				<li id="navuserlist"><a href="http://board.kohina.net/userlist.php">User list</a></li>
				<li id="navrules"><a href="http://board.kohina.net/misc.php?action=rules">Rules</a></li>
				<li id="navsearch"><a href="http://board.kohina.net/search.php">Search</a></li>
				<li id="navregister"><a href="http://board.kohina.net/register.php">Register</a></li>
				<li id="navlogin"><a href="http://board.kohina.net/login.php">Login</a></li>
			</ul>
		</div>
		<div id="brdwelcome" class="inbox">
			
			<p>You are not logged in.</p>
			<ul class="conr">
				<li><span><a href="http://board.kohina.net/search.php?action=show_recent" title="Find topics which contain recent posts.">Active topics</a></span></li>
				<li><span><a href="http://board.kohina.net/search.php?action=show_unanswered" title="Find topics which have not been replied to.">Unanswered topics</a></span></li>
			</ul>
			<div class="clearer"></div>
		</div>
	</div>
</div>

<div id="announce" class="block">
	<div class="hd"><h2><span>Announcement</span></h2></div>
	<div class="box">
		<div id="announce-block" class="inbox">
			<div class="usercontent">We just changed the forum software, please contact the <a href="mailto:board@kohina.net">staff</a> if something is fobar!</div>
		</div>
	</div>
</div>

<div id="brdmain">
<div class="linkst">
	<div class="inbox crumbsplus">
		<ul class="crumbs">
			<li><a href="http://board.kohina.net/index.php">Index</a></li>
			<li><span>»&nbsp;</span><a href="http://board.kohina.net/viewforum.php?id=7">UADE - Developer discussion</a></li>
			<li><span>»&nbsp;</span><a href="http://board.kohina.net/viewtopic.php?id=894"><strong>Removed a resampler name "anti"</strong></a></li>
		</ul>
		<div class="pagepost">
			<p class="pagelink conl"><span class="pages-label">Pages: </span><strong class="item1">1</strong></p>
			<p class="postlink conr"><a href="http://board.kohina.net/post.php?tid=894">Post reply</a></p>
		</div>
		<div class="clearer"></div>
	</div>
</div>

<div id="p4939" class="blockpost rowodd blockpost1">
	<h2><span><span class="conr">#1</span> <a href="http://board.kohina.net/viewtopic.php?pid=4939#p4939">2006-06-22 17:33:31</a></span></h2>
	<div class="box">
		<div class="inbox">
			<div class="postbody">
				<div class="postleft">
					<dl>
						<dt><strong><a href="http://board.kohina.net/profile.php?id=259">shd</a></strong></dt>
						<dd class="usertitle"><strong>Member</strong></dd>
						<dd class="postavatar"><img src="UADE%20-%20Developer%20discussion%20%231_pliki/259.gif" alt="" height="64" width="64"></dd>
						<dd><span>From: Tampere, Finland</span></dd>
						<dd><span>Registered: 2003-06-29</span></dd>
						<dd><span>Posts: 564</span></dd>
						<dd class="usercontacts"><span class="website"><a href="http://www.iki.fi/shd">Website</a></span></dd>
					</dl>
				</div>
				<div class="postright">
					<h3>Re: Removed a resampler name "anti"</h3>
					<div class="postmsg">
						<p>Removed the name "anti" from resampler list, which meant the 
accumulator resampler. "default" has meant accumulator for a long time 
already.</p>
					</div>
					<div class="postsignature postmsg"><hr><p>Use UADE for Amiga music playback: <a href="http://zakalwe.fi/uade/">http://zakalwe.fi/uade/</a></p></div>
				</div>
			</div>
		</div>
		<div class="inbox">
			<div class="postfoot clearb">
				<div class="postfootleft"><p><span>Offline</span></p></div>
				<div class="postfootright">
					<ul>
						<li class="postquote"><span><a href="http://board.kohina.net/post.php?tid=894&amp;qid=4939">Quote</a></span></li>
					</ul>
				</div>
			</div>
		</div>
	</div>
</div>

<div id="p4940" class="blockpost roweven">
	<h2><span><span class="conr">#2</span> <a href="http://board.kohina.net/viewtopic.php?pid=4940#p4940">2006-06-22 19:14:05</a></span></h2>
	<div class="box">
		<div class="inbox">
			<div class="postbody">
				<div class="postleft">
					<dl>
						<dt><strong>alankila</strong></dt>
						<dd class="usertitle"><strong>Guest</strong></dd>
					</dl>
				</div>
				<div class="postright">
					<h3>Re: Removed a resampler name "anti"</h3>
					<div class="postmsg">
						<p>sinc filtering code has also seen an update.</p><p>After 
spending a few months tinkering with different approaches, I posted an 
update to shd, which is conceptually different and now quite mature.</p><p>In
 this update, I firstly reduce the size of the sinc table from grossly 
overspecified 4096 point convolution to merely modestly overspecified 
2048 point convolution. Sound quality is paramount, and I'm hesitant to 
reduce the table further without more experiments.</p><p>While 
previously we were talking about FIR convolution, only optimized, the 
new mode is structured instead like bandlimited step synthesis. The 
conceptual difference is large, but the implementation is nearly 
identical to the old.</p><p>In band-limited step synthesis, the hard 
edges of Paula's rising and falling pulses are replaced by values from a
 bandlimited step table. The exact shape of the blep (which looks like a
 smoothly rising wave with some ringing on the top) encodes the phase of
 the pulse which it represents.</p><p>The performance of the sinc code 
has also been improved by combining the digital models of the analog 
filters directly into the sinc tables. This may seem somewhat 
miraculous, but it allows running the filters for LED and A500 sound 
free. Thus when using the sinc mode, filters are evaluated in the 
Paula's clock frequency of 3.54 MHz, and they have become sampling rate 
independent. In addition, they replicate their analog counterparts 
precisely across the audible frequency band.</p><p>For filter-less A1200, a low-pass 32 kHz filter has been added to replicate the current leakage into the LED filter.</p><p>Also,
 in order to run IIR filters on the sinc table, the symmetric sinc table
 has gone through minimum phase reconstruction to give the IIR filters 
longest period to settle. This should make no audible difference, but 
explains why there is no longer any preringing at transitions in the 
sample stream.</p><p>The sinc mode does not use floating point computations unlike the default mode, and could be faster for machines without FPU.</p>
					</div>
				</div>
			</div>
		</div>
		<div class="inbox">
			<div class="postfoot clearb">
				<div class="postfootleft"></div>
				<div class="postfootright">
					<ul>
						<li class="postquote"><span><a href="http://board.kohina.net/post.php?tid=894&amp;qid=4940">Quote</a></span></li>
					</ul>
				</div>
			</div>
		</div>
	</div>
</div>

<div id="p4941" class="blockpost rowodd">
	<h2><span><span class="conr">#3</span> <a href="http://board.kohina.net/viewtopic.php?pid=4941#p4941">2006-06-22 19:19:52</a></span></h2>
	<div class="box">
		<div class="inbox">
			<div class="postbody">
				<div class="postleft">
					<dl>
						<dt><strong><a href="http://board.kohina.net/profile.php?id=259">shd</a></strong></dt>
						<dd class="usertitle"><strong>Member</strong></dd>
						<dd class="postavatar"><img src="UADE%20-%20Developer%20discussion%20%231_pliki/259.gif" alt="" height="64" width="64"></dd>
						<dd><span>From: Tampere, Finland</span></dd>
						<dd><span>Registered: 2003-06-29</span></dd>
						<dd><span>Posts: 564</span></dd>
						<dd class="usercontacts"><span class="website"><a href="http://www.iki.fi/shd">Website</a></span></dd>
					</dl>
				</div>
				<div class="postright">
					<h3>Re: Removed a resampler name "anti"</h3>
					<div class="postmsg">
						<div class="quotebox"><blockquote><div><p>After spending a few 
months tinkering with different approaches, I posted an update to shd, 
which is conceptually different and now quite mature.</p></div></blockquote></div><p>Things
 are not mature before they have actually been used by many for a long 
time. And "default" is still the recommended resampler from my POV.</p>
					</div>
					<div class="postsignature postmsg"><hr><p>Use UADE for Amiga music playback: <a href="http://zakalwe.fi/uade/">http://zakalwe.fi/uade/</a></p></div>
				</div>
			</div>
		</div>
		<div class="inbox">
			<div class="postfoot clearb">
				<div class="postfootleft"><p><span>Offline</span></p></div>
				<div class="postfootright">
					<ul>
						<li class="postquote"><span><a href="http://board.kohina.net/post.php?tid=894&amp;qid=4941">Quote</a></span></li>
					</ul>
				</div>
			</div>
		</div>
	</div>
</div>

<div id="p4942" class="blockpost roweven">
	<h2><span><span class="conr">#4</span> <a href="http://board.kohina.net/viewtopic.php?pid=4942#p4942">2006-06-22 21:31:42</a></span></h2>
	<div class="box">
		<div class="inbox">
			<div class="postbody">
				<div class="postleft">
					<dl>
						<dt><strong>alankila</strong></dt>
						<dd class="usertitle"><strong>Guest</strong></dd>
					</dl>
				</div>
				<div class="postright">
					<h3>Re: Removed a resampler name "anti"</h3>
					<div class="postmsg">
						<p>So, I suppose by that argument sinc is enabled by default in next version of uade, then? I'll call it mature a week after that.</p>
					</div>
				</div>
			</div>
		</div>
		<div class="inbox">
			<div class="postfoot clearb">
				<div class="postfootleft"></div>
				<div class="postfootright">
					<ul>
						<li class="postquote"><span><a href="http://board.kohina.net/post.php?tid=894&amp;qid=4942">Quote</a></span></li>
					</ul>
				</div>
			</div>
		</div>
	</div>
</div>

<div class="postlinksb">
	<div class="inbox crumbsplus">
		<div class="pagepost">
			<p class="pagelink conl"><span class="pages-label">Pages: </span><strong class="item1">1</strong></p>
			<p class="postlink conr"><a href="http://board.kohina.net/post.php?tid=894">Post reply</a></p>
		</div>
		<ul class="crumbs">
			<li><a href="http://board.kohina.net/index.php">Index</a></li>
			<li><span>»&nbsp;</span><a href="http://board.kohina.net/viewforum.php?id=7">UADE - Developer discussion</a></li>
			<li><span>»&nbsp;</span><a href="http://board.kohina.net/viewtopic.php?id=894"><strong>Removed a resampler name "anti"</strong></a></li>
		</ul>
		<div class="clearer"></div>
	</div>
</div>
</div>

<div id="brdfooter" class="block">
	<h2><span>Board footer</span></h2>
	<div class="box">
		<div id="brdfooternav" class="inbox">
			<div class="conl">
				<form id="qjump" method="get" action="viewforum.php">
					<div><label><span>Jump to<br></span>
					<select name="id" onchange="window.location=('viewforum.php?id='+this.options[this.selectedIndex].value)">
						<optgroup label="Kohina">
							<option value="4">Game and Demo Music</option>
							<option value="3">Hardware Discussion</option>
							<option value="5">Suggestions &amp; Feedback</option>
							<option value="2">The Kohina Playground</option>
							<option value="8">Song Requests and Recordings</option>
						</optgroup>
						<optgroup label="UADE - Unix Amiga Delitracker Emulator">
							<option value="6">UADE - User discussion</option>
							<option value="7" selected="selected">UADE - Developer discussion</option>
						</optgroup>
						<optgroup label="XMMS-SID - SID-plugin for XMMS">
							<option value="9">XMMS-SID Discussion</option>
						</optgroup>
					</select>
					<input value=" Go " accesskey="g" type="submit">
					</label></div>
				</form>
			</div>
			<div class="conr">
				<p id="feedlinks"><span class="atom"><a href="http://board.kohina.net/extern.php?action=feed&amp;tid=894&amp;type=atom">Atom topic feed</a></span></p>
				<p id="poweredby">Powered by <a href="http://fluxbb.org/">FluxBB</a></p>
			</div>
			<div class="clearer"></div>
		</div>
	</div>
</div>

</div>
<div class="end-box"><div><!-- Bottom corners --></div></div>
</div>



</body></html>